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췌장암에서 Cyclooxygenase - 2 발현의 역할
김은경,이용욱,이규택,최규완,박동일,백승운,이준행,이종균,고광철,이풍렬,이종철,김재준,김완선,공구 대한소화기학회 2001 대한소화기학회지 Vol.38 No.3
Background/Aims: Accumulating evidence suggests that the use of NSAID may reduce the incidence of colorectal cancer. The likely mechanisms of these effects by NSAID is cyclooxygenase-2 (COX-2)-related inhibition of tumor proliferation and induction of apoptosis. The aim of our study was to examine possible roles and clinical significance of COX-2 expression in pancreatic cancer. Methods: Seventy-two pancreatic adenocarcinoma tissue specimens were obtained from surgical resection. After the immunohistochemical staining of the specimens, we examined proliferation activity (assayed by Ki-67 expression), apoptosis (by TUNEL stain), and microvessel density (by CD34 expression). We also investigated the relationship between the immunohistochemical expression of COX-2 and various clinicopathological characteristics. Results: The COX-2 positive rate in pancreatic epithelial cells was 41.7%. Proliferation index (PI) was significant higher in COX-2 positive specimens comparing to negative specimen (p=0.015) and the increase in intensity of COX-2 expression correlated with increasing PI (p=0.036). Apoptotic index (AI) was significantly higher in positivee COX-2 expression than in negative expression (p=0.044), but there was no significant difference in AI/PI between the COX-2 positive and negative specimens (p=0.44). The expression of COX-2 protein did not correlate with microvessel density, sex, age, differentiation, tumor size, stage, metastasis or patients survival. Conclusions: The expression of COX-2 enzyme in pancreatic cancer contributes to tumor proliferation, but is not related to apoptosis, angiogenesis or clinical characteristics. Further study is needed to examine the clinical usefulness of NSAID and COX-2 selective inhibitors.
Effects of PASS Theory on Aged Chinese EFL Learners’ Reading Comprehension Ability
Yipu Gong(Yipu Gong),Jongbok Lee(Jongbok Lee) 한국영어어문교육학회 2023 영어어문교육 Vol.29 No.1
This study investigates the English learning conditions of aged Chinese EFL learners including their reading comprehension ability through a cognitive approach-PASS theory. A quantitative-dominated research method is adopted in the study. After a 15- week semester, a significant distinction in both posttest (reading comprehension score, t = 3.39, p = .000) and retention test (reading comprehension scores, t = 4.62, p = .000) indicates that the cognitive teaching approach through PASS model outperforms the traditional teaching approach. As another independent variable, the quantity of Chinese characters used in English learning only sees a significant difference for the population according to reading comprehension scores in the posttest results (posttest, F = 4.56, p = .038 & retention test, F = 1.04, p =. 312). Besides, during the retention test, the Chinese characters quantity factor showed significant effect only on the experiment group’s English reading comprehension results. Through this study, an effective cognitive pedagogy for EFL aged learners has been claimed to public. Admittedly, there is still limitation. The investigation of corresponding details of the dynamic changes of the aged EFL learners’ cognitive process is insufficient. This limitation can be lifted up in future studies and transformed into further academic extension as well.
Sensitivity of surface characteristics on the simulation of wind-blown-dust source in North America
Park, S.H.,Gong, S.L.,Gong, W.,Makar, P.A.,Moran, M.D.,Stroud, C.A.,Zhang, J. Pergamon Press ; Elsevier [distribution] 2009 Atmospheric environment Vol.43 No.19
Recently, a wind-blown-dust-emission module has been built based on a state-of-the-art wind erosion theory and evaluated in a regional air-quality model to simulate a North American dust storm episode in April 2001 (see Park, S.H., Gong, S.L., Zhao, T.L., Vet, R.J., Bouchet, V.S., Gong, W., Makar, P.A., Moran, M.D., Stroud, C., Zhang, J. 2007. Simulation of entrainment and transport of dust particles within North America in April 2001 (''Red Dust episode''). J. Geophys. Res. 112, D20209, doi:10.1029/2007JD008443). A satisfactorily detailed assessment of that module, however, was not possible because of a lack of information on some module inputs, especially soil moisture content. In this paper, the wind-blown-dust emission was evaluated for two additional dust storms using improved soil moisture inputs. The surface characteristics of the wind-blown-dust source areas in southwestern North America were also investigated, focusing on their implications for wind-blown-dust emissions. The improved soil moisture inputs enabled the sensitivity of other important surface characteristics, the soil grain size distribution and the land-cover, to dust emission to be investigated with more confidence. Simulations of the two 2003 dust storm episodes suggested that wind-blown-dust emissions from the desert areas in southwestern North America are dominated by emissions from dry playas covered with accumulated alluvial deposits whose particle size is much smaller than usual desert sands. As well, the source areas in the northwestern Texas region were indicated to be not desert but rather agricultural lands that were ''activated'' as a wind-blown-dust sources after harvest. This finding calls for revisions to the current wind-blown-dust-emission module, in which ''desert'' is designated to be the only land-cover category that can emit wind-blown dust.
An Optimal Inspection and Preventive Replacment Policy
Gong, Moung-Bock 울산대학교 1984 연구논문집 Vol.15 No.1
본 논문은 고장을 검사에 의해서만 탐지할 수 있는 준비태세 시스템의 새로운 정비정책을 제시하고 있다. 정책은 고장을 발견즉시 교체하거나 예방정비로서 시간 x??에 교체하는 것이다. This paper presents a new maintenance policy for a preparedness system in which a failure is detected by inspection only. The policy treated is that replace upon detection of failure or at time x?? as a preventive maintenance.
Gong Dan(龚,丹) 세계문화관광학회 2008 Conference Proceedings Vol.9 No.0
In the" Disequilibrium of Supply and Demand" background of tourism industry, At present, there have beer: significant changes in the job selecting attitudes of tourism students: high expectations for job selecting goals, job selecting utilitarian motives clear tendency, job selecting incomplete information also contributed to the tourism students engaged in the tourism industry to give up the dominant factor-Therefore, we should actively explore the methods and paths of the job selecting attitudes education of tourism students, to provide Chinese tourism personnel with reference. 在旅游业人才供需错位的背景下,目前,旅游专业学生的择业观已经发生了明显的变化: 择业目标期望值偏高,择业取向功利化,择业认知信息表面化,导致了旅游专业学生在择业时放弃了自己的专业选择。所以,我们要充分发挥正确的教育导向作用,引导学生转变择业观念,不断增强旅游业学生择业观教育,为旅游人力资源提供保障。
Gong Wenping,Du Jingli 대한의학회 2023 Journal of Korean medical science Vol.38 No.42
In the context of the coronavirus disease 2019 (COVID-19) pandemic, Bacillus CalmetteGuérin (BCG), a tuberculosis (TB) vaccine, has been investigated for its potential to prevent COVID-19 with conflicting outcomes. Currently, over 50 clinical trials have been conducted to assess the effectiveness of BCG in preventing COVID-19, but the results have shown considerable variations. After scrutinizing the data, it was discovered that some trials had enrolled individuals with active TB, latent TB infection, or a history of TB. This finding raises concerns about the reliability and validity of the trial outcomes. In this study, we explore the potential consequences of including these participants in clinical trials, including impaired host immunity, immune exhaustion, and the potential masking of the BCG vaccine’s protective efficacy against COVID-19 by persistent mycobacterial infections. We also put forth several suggestions for future clinical trials. Our study underscores the criticality of excluding individuals with active or latent TB from clinical trials evaluating the efficacy of BCG in preventing COVID-19.
Correlated primordial spectra in effective theory of inflation
Gong, Jinn-Ouk,Yamaguchi, Masahide American Physical Society 2017 Physical review. D Vol.95 No.8
<P>We derive a direct correlation between the power spectrum and bispectrum of the primordial curvature perturbation in terms of the Goldstone mode based on the effective field theory approach to inflation. We show examples of correlated bispectra for the parametrized feature models presented by the Planck collaboration. We also discuss the consistency relation and the validity of our explicit correlation between the power spectrum and bispectrum.</P>